14 lines
250 B
Bash
14 lines
250 B
Bash
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#!/bin/sh
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IP=$(curl ifconfig.me)
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curl_retval=$?
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host_answer=$(host "$IP")
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rev_dns="${host_answer##* }"
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rev_dns="${rev_dns%.}"
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echo "Rev. DNS is: $rev_dns"
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sed -e "s/^myhostname.*/myhostname = $rev_dns ses/" /etc/postfix/main.cf
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echo $curl_retval
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